Sewing machine cabinet



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Jan. 26, 1932. KOPF 1,843,085

SEWING MACHINE CABINET Filed Nov 21, 1929 3 Sheets-Sheet I5 Y/ a A1" dtkomu;

Patented Jan. 26, 1932 PATENT Fries;

ETEIL A..'K0]?F, OF ROSELLE PARK, NEW JERSEY, ASSIGNOR TO THE SINGER MANU- FACTURING COMPANY, OF ELIZABETH, ATEW JERSEY, A CORPORATION OF NEW JERSEY SEWING MACHINE CABINET Application filed November 21, 1929. Serial No. 408,691.

This invention relates to sewing machine cabinets of the drop-head disappearing treadle type and has for an object to reorganize the mechanism of a cabinet of this type to facilitate-its manufacture and enhance its reliability and ease of operation. Another object of the invention is to provide the drivewheel with a dress-guard which will not interfere with the raising of the treadle to its concealed position.

To the attainment of the above and other objects of the invention, as will hereinafter appear, a 'treadle-frame-lifting lever is fulcrumed coaxially with the drive-wheel and the dress-guard is mounted on such lever so that, when the lever is rocked 'to lift the treadle-carrying frame to concealed position, the dress-guard is automatically moved out of the way and does not interfere with the movement ofthe treadle-carrying frame.

The usual lifter-plate which rises and falls with the sewing machine, in the movements of. the latter into andout of the cabinet, is connected by a push-rod to the treadle-framelifting lever with which said push-rod has a lost motion sliding connection whereby the push-rod operates only in the latter part of its downward motion to rock the treadleframe-lifting lever, at which time the lifterplate and push-rod have an effective toggle action upon the treadle-frame parts operated thereby.

In the accompanying drawings, Fig. 1 is a transverse vertical sectional view through a sewing machine cabinet embodying the invention. Fig. 2 is a longitudinal vertical section through the cabinet. Fig. 3 is a frabnientary vertical section on the line 33, Fig. 2. Fig. 4 is a section on the line 44, Fig. 1. Fig. 5 is a section on the line 5-5, Fig. 1,

and Fig. 6 is a section on the line 66, Fig. 1.

The invention is disclosed as embodied in a drop-head sewing machlne cabinet having side walls 1, 2, a back-wall 3, a front door 4:

and a top-member 5, all supported by the legs 6. The top 5 is provided with the usual aperture 5 through which the sewing head 7 is lowered, when not in use. Pivotally car- I ried by the table-top at 8 is the usual lifterplate 9 which moves from its full line posi-- tion, Fig. 1, to dotted line position, when the sewing head 7 is lowered to its concealed or inoperative position. A strong spring 10 presses upwardly against the lifter-plate 9 whose function is to partially sustain the weight of the sewing machine and make it easier for the operator to lift and lower the latter. Such a lifter-plate is disclosed, for example, in the U. S. patent to Diehl et al., No. 541,474 of June 25,1895. 7

. Mounted on the side wall 1 is a plate 11 to which is fixed the bearing pin 12 for the drive-wheel 13 having a crank-pin 14 connected by the pitman 15 to the treadle-plate 16. The treadle-plate 16 is mounted for rocking movements upon the horizontal rod 17 which is fixed at its opposite ends to and is supported bythe arms 18 secured to the bar 19 journaled in the bearing brackets 20 mounted on the side walls 1 and 2. The rods 17, 19 and arms 18 constitute a treadle-platesupporting frame which may be moved from its lower operative position, shown in full lines in Fig. 1, to its upper concealed position shown in dotted lines. The arms 18 of the treadle-supporting frame have feet 21 which, in the lowered position of the frame, rest upon the floor f and support the frame and treadle against the operative forces applied thereto.

Fulcrumed on the stud 12, coaxial with the drive-wheel 13, is a lever 22 connected at its front end by a pivot-bolt 23 to the upper end of a link 24 which is pivotally connected at 25 to one of the arms 18 of the treadlesupporting frame. There is also fixed to the lever 22 by the pivot-bolt 23, Fig. 6, the shank 26 of abracket 27 carrying the dress-guard 28 which moves with the lever 22 from full line to dotted line position, Fig. 1, together with the treadle-supporting frame 17, 18, 19, and hence does not interfere with the upward movement of such frame.

The lever 22 is operated by the movement of the lifter-plate 9 which has pivotally connected to it at 29 the upper end of a push-rod 30 having a lost motion sliding engagement with the swivel-head 31, Fig. 1, pivoted at 32 on the lever 22. The rod 30 carries a stop-member 33 which, in the latter part of the down-motion of the lifterplate 9, engages the swivel-head 31 and rocks the lever 22. i The lifter-plate and rod 30 constitute a toggle-device, the intermediate pivot 29 of whichcrosses alignment between the pivots 8 and 32, in moving from full line to dotted line position, Fig. 1.

'ing an aperture through which the There is-preferably secured to the arm 18 remote fromthe drive-wheel 13, arest 3 L 1 which engages the treadle-plate 16, Fig; 3, in the coneealed position of the latter,

the treadle-plate, thereby driving the pitman 15 to the elevated position shown inFig. 1. Mounted on the side wall 1,'belowthe free end of the forwardly extending arm of the lever 22, isan' angle-piece 35 which serves as a stop or support for the lever 22, should the cabinet be lifted while the treadle-frame is in its lower position. The angle-.piecei35 prevents the treadle-frame' from dropping more than slightly. below its floor-engaging position,

The push-rod 30 is fitted at itslower end withastop-screw- 36 the head of which is j larger than the rod 30. and prevents the swivelehead 31 from being strippedfrom the rod 30in case the operator should, by-mis take, lift thetreadle-frame inet. I

Having thus setfforth the nature of the inventiomwhat I claim herein is 1. In asewing machine cabinet, a topmember, a treadle, a treadle-supporting frame movable from a lower operative position to an upper concealed position, a treadleframe-lifting lever connected to said treadle inoperative position, a movably mounted and-lifts V.

' rest on the floor or be swung upwardly with directly instead 7 of bydropping. the sewing head into the cabtreadle-supporting-frame, and a push-rod connection between saidlifter-plate and the rearwardly extending arm of said lever, said connection having provision for lost-motion.

4. A drop-head sewing machine cabinet having top and side walls, said top wall having an aperture through which the sewing machine is dropped when not in use, a lifterplate pivoted to the top wall, a treadle-supporting frame pivotallymounted within said cabinet, said frame having feet adapted to said frame to a concealed position, alever fulcrumed on one of said side walls and connected to said treadle-supporting frame, and a push-rod pivotally connected to said lifter plate and, slidably connected to said lever,

saidpush-rod having a stop adapted to engage said lever inthe downward movement of said lifter-plate and rock said lever to elevatethe treadle supporting frame to conoealed position. V I

5. A drop-head sewing machine cabinet having top and side walls, said topwall having an aperture through which the sewing machine is dropped when not in use, a lifterplate pivoted to the top wall, a drive-wheel rotatably mounted on one of said side walls, a treadle, a pitman connectionibetween said treadle and drive-wheel, a treadlesupporting frame pivotally mounted within said cabinet, said frame having feet adapted to rest on the floor'or be swung. upwardly with said frame to a concealed position, a lever fulcrumed coaxially with said drive-wheel and connected to said lifter-plate and treadlesupporting frame, and a dress-guard mount ed on said lever to swing with the latter..

In testimony whereof, I have signed my name to this specification.

EMIL A. KOPF.

dress-guard for'said drive-wheel, and anoperative connection between said dress-guard and'treadle frame.

8. A drop-head sewing having top and side walls,

machine "cabinet said top wall'havsewing machine is dropped when not in use, a lifterplate pivoted to the top wall, a treadle-supporting frame pivotally mounted within said cabinet, said frame having feet adapted to .rest on the floor orbe swung upwardly with said frame to a. concealed. position, a lever V fulcrumed on one ofsaid side walls and having forwardly and rearwardly extending arms, a link connection between the forwardly extending arm1 of said lever and the n V 

